Which of the following variables are best thought of as continuous, which discrete? Indicate your choice for each

(a) The total number of goals scored by a soccer team in a season

(b) The lifetime, in hours, of a 100

-watt light bulb manufactured by Northington Industries

(c) The number of students, in a class of 35

, who improve their score from the first midterm to the second midterm

(d) In a reaction time study involving 12

participants, the number of participants whose average time is between 400

and 600

milliseconds